MPLAD15KP22AE3 Circuit Protection

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TVS diodes are an essential component for devices exposed to high voltage as they help protect components and electronics from electrical transients.

MPLAD15KP22AE3 is a TVS diode that acts as a transient voltage surge suppressor to protect high-speed signal lines from transient voltage surges, ESD, and EFT. It is suitable for use in the automotive sector, consumer electronics, telecommunications, and industrial sectors. The MPLAD15KP22AE3 can protect components from a variety of sources such as electrostatic discharge (ESD), lightning, and other high-energy transients.

The MPLAD15KP22AE3 is a two-lead, surface-mount device that comes in a leadless, very small form factor of 3.22 x 1.78 x 1.4 mm. It offers a low dynamic resistance of 0.135 ohms and a low clamping voltage of 15.2 V at 8 A of 8/20 µs waveform. This diode is suitable for operation up to a temperature range of -55°C to 150°C.

To better understand the working principle of the device, the diagram below illustrates the primary power path of the device. The integrated protection modes reduce the amount of board space needed to protect circuits from a variety of transients.

The working principle of the MPLAD15KP22AE3 is based on avalanche multiplication. When the device is connected to a power source and exceeds the specified avalanche or clamp voltage ratings, current will flow through the diode and the avalanche region of the diode will be activated. This process is known as avalanche breakdown, which begins at the PN junction and creates a significantly larger current than the original current flow.

The avalanche will continue until the current flow has been reduced to a safe level. This is accomplished by the dynamic inner PN junction field created during avalanche multiplication. The field will increase the resistance of the junction, reducing the current. The voltage across the diode will also be reduced to a safe level. The current flow is proportional to the applied voltage, so the voltage across the PN junction is inversely proportional to the current flow.

Once the voltage across the diode has been reduced, the current flow will stop and the transient voltage will be clamped. This process will protect the circuit and its components from damage due to the overvoltage. This protection mode is enabled whenever the voltage across the diode exceeds the minimum avalanche voltage of the device.

The MPLAD15KP22AE3 is a transient voltage surge suppressor designed to protect high-speed signal lines from damage due to electrical transients. It is suitable for a variety of applications in the automotive, telecommunications, consumer electronics, and industrial sectors. It features a low dynamic resistance of 0.135 ohms and a low clamping voltage of 15.2 V at an 8/20 µs waveform current of 8 A. The working principle of the device is based on avalanche multiplication, reducing the voltage across the PN junction to a safe level whenever it exceeds the minimum avalanche voltage.

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